CN211852214U - Fan stationary blade control system - Google Patents
Fan stationary blade control system Download PDFInfo
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- CN211852214U CN211852214U CN202020144177.XU CN202020144177U CN211852214U CN 211852214 U CN211852214 U CN 211852214U CN 202020144177 U CN202020144177 U CN 202020144177U CN 211852214 U CN211852214 U CN 211852214U
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Abstract
The utility model discloses a quiet leaf control system of fan, including DCS system, safety instrument system, actuating mechanism, lamp screen, displacement sensor, quiet leaf on-the-spot display system. The safety instrument system comprises a comparison module A, a comparison module B, an OR gate module, a stator blade display A, a stator blade display B, an OR gate module B, an actuating mechanism alarm, an actuating mechanism power-off alarm and an actuating mechanism operation state display. Utilize the utility model discloses can guarantee when fan control breaks down, remote control can be followed to the control of fan and switch to local control, avoids the phenomenon that quiet leaf is opened entirely or is closed entirely. The undisturbed switching of the fan stationary blade control can be realized by introducing the displacement sensor on site and introducing corresponding logic operation into the safety instrument system.
Description
Technical Field
The utility model relates to a petrochemical device control system especially relates to be applied to quiet leaf control system of fan in petrochemical field.
Background
The fan stator blade control system is an important component of fan operation, and changes the resistance condition of an inlet by changing the flow area and the inlet airflow guide so as to change the working condition of the fan. The stable operation of the fan can be ensured only when the fan stationary blade control system operates stably, so that the fan stationary blade control is the key for ensuring the stable, efficient and long-period operation of the device. The problem of oil leakage often appears in present quiet leaf control system, influences the even running of device. The U.S. RE XA electro-hydraulic actuator system is a built-in oil cylinder, and power oil is not required to circulate outside the system, so that the problem of oil leakage can be solved by adopting the actuator. There are problems with this system. Firstly, a displacement sensor in a REXA electro-hydraulic actuator is an independent potentiometer type sensor, once faults such as short circuit or open circuit of a lead, drifting and the like occur, a controller does not have the function of loss tracking, and a stator blade can be fully opened or closed in a remote control mode. If the handwheel operation is switched to in situ, the control mechanism must be de-energized. In this case, neither the valve position signal displayed by the field controller nor the valve position signal of the remote control room can be seen. At the moment, if the position of the static blade is changed by the hand wheel, once the power is on, the control mechanism tracks the actual valve position, the static blade acts at the moment, and the device cannot realize undisturbed switching.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a can realize quiet leaf control system of fan that quiet leaf control does not have the disturbance and switches.
The technical solution of the utility model is that:
a fan stator blade control system comprises a DCS (distributed control system), a safety instrument system and an executing mechanism, wherein a signal converter is arranged in the safety instrument system and used for receiving stator blade control signals transmitted into the safety instrument system by the DCS and converting the stator blade control signals into stator blade position signals to be transmitted out of the safety instrument system, and the executing mechanism is used for receiving stator blade position signals and controlling a fan stator blade according to the stator blade position signals; a stator blade position sensor is arranged in the actuating mechanism, and can monitor the position of the stator blade of the fan in real time, generate an actuating mechanism response signal and transmit the actuating mechanism response signal back to the safety instrument system; the safety instrument system further comprises a comparison module A, a comparison module B and/or a door module A, wherein: the comparison module A is used for receiving the stator blade position signal and the actuating mechanism response signal, generating a comparison signal A through comparison operation and transmitting the comparison signal A to the OR gate module A; the comparison module B is used for receiving a displacement sensor return signal and the actuating mechanism return signal, generating a comparison signal B through comparison operation and transmitting the comparison signal B to the OR gate module A; the OR gate module A is used for receiving the comparison signal A and the comparison signal B, generating a remote-to-local switching instruction through OR operation, and outputting the remote-to-local switching instruction to the execution mechanism through the safety instrument system; the execution mechanism can realize the switching between the remote control mode and the local control mode after receiving a remote-to-local switching instruction transmitted by the safety instrument system.
Further, the DCS system is a DeltaV system of Emerson.
Further, the actuator is a REXA electro-hydraulic actuator.
Furthermore, the executing mechanism also comprises a relay, a remote control switch, a local control switch, a confirmation switch, a remote control module and a local control module, when the executing mechanism receives a remote-to-local switching instruction, the relay is electrified, the remote control switch and the remote control module are disconnected, the local control switch, the confirmation switch and the local control module are connected, and the switching between the remote control mode and the local control mode is realized.
Further, the relay is a 24V DC driven omron relay, and the remote control module and the local control module are both REXA TDB04011.01 control modules.
Further, the safety instrument system is a TS3000 system of the company TRICONEX.
Furthermore, a stator blade display system and an alarm system are arranged in the safety instrument system, the stator blade display system comprises a stator blade display A and a stator blade display B, and the stator blade display A is used for receiving the return signal of the displacement sensor and generating a stator blade display image A; the stator blade display B is used for receiving the actuating mechanism response signal and generating a stator blade display image B; alarm system includes actuating mechanism alarm, actuating mechanism operating condition display, or door module B and lamp screen down, wherein: when the executing mechanism is in an abnormal operation state, the executing mechanism sends out an alarm signal, and the executing mechanism alarm receives the alarm signal and displays an alarm; when the actuating mechanism is in a power-off state, the actuating mechanism sends out a power-off alarm signal of the actuating mechanism, and the power-off alarm display of the actuating mechanism receives the power-off alarm signal of the actuating mechanism and displays an alarm; when the executing mechanism sends out the executing mechanism state signal, the executing mechanism operating state display receives the executing mechanism state signal and displays the current operating state of the executing mechanism; the OR gate module B is used for receiving the alarm signal and the power-off alarm signal of the actuating mechanism, generating an integrity alarm signal of the actuating mechanism through OR operation and outputting the integrity alarm signal to the lamp screen.
Further, the comparison module A, the comparison module B, the door module A and/or the door module B are all programmable logic modules built in the TS3000 system, and the model of the lamp screen is A D17-16/DC 24V.
Further, the device also comprises a static blade field display, wherein the static blade field display is used for receiving the return signal of the displacement sensor and generating a static blade field display image, and the model of the static blade field display is DY22GB 02D.
Further, the displacement sensor is KYDM-LG1A4210-GB0600M2J115-WO, and the stator blade position sensor is 50L 05C 502W 06962A 5K omega.
The utility model has the advantages that:
the switching of remote control modes and local control modes of an actuating mechanism in the fan stationary blade control system is utilized, so that when fan control fails, a fan can be switched from remote control to local control, the control of the fan stationary blade is not affected by remote given and feedback signals in a failure state, and the phenomenon that the stationary blade is fully opened or fully closed is avoided. In addition, the position of the stator blade is monitored in real time by introducing a displacement sensor on site, corresponding logic operation is introduced into a safety instrument system, and undisturbed switching of fan stator blade control can be realized by matching with a local control mode of an actuating mechanism.
Drawings
FIG. 1 is a schematic structural view of a stationary blade control system of a fan according to the present invention;
fig. 2 is a control circuit diagram of the present invention;
FIG. 3 is a wiring diagram of the relay of the present invention;
fig. 4 is a schematic control flow chart of the present invention.
In the figure: 1. DCS system, 2, safety instrumented system, 201, signal converter, 202, comparison module a, 203, comparison module B, 204, or door module a, 205, vane display a, 206, vane display B, 207, or door module B, 208, actuator alarm, 209, actuator power-down alarm, 210, actuator operating state display, 3, actuator, 301, relay, 302, remote control switch, 303, local control switch, 304, confirmation switch, 305, vane position sensor, 306, remote control module, 307, local control module, 4, light screen, 5, displacement sensor, 6, vane site display.
Detailed Description
In order to enhance the understanding of the present invention, the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the fan stationary blade control system includes a DCS system 1, a safety instrument system 2 and an actuator 3, wherein a signal converter 201 is disposed in the safety instrument system 2, the signal converter 201 is configured to receive a stationary blade control signal transmitted into the safety instrument system 2 by the DCS system 1, convert the stationary blade control signal into a stationary blade position signal, and transmit the stationary blade position signal to the safety instrument system 2, and the actuator 3 is configured to receive the stationary blade position signal and control the fan stationary blade according to the stationary blade position signal; the fan stationary blade control system also comprises a displacement sensor 5, wherein the displacement sensor is used for monitoring the position of the fan stationary blade in real time, generating a displacement sensor return signal and transmitting the signal back to the safety instrument system 2; a stator blade position sensor 305 is arranged in the actuating mechanism 3, and the stator blade position sensor 305 can monitor the position of the stator blade of the fan in real time, generate an actuating mechanism response signal and transmit the actuating mechanism response signal back to the safety instrument system 2; the safety instrumented system 2 further comprises a comparison module a202, a comparison module B203 and/or a door module a204, wherein: the comparison module A202 is used for receiving the stator blade position signal and the actuating mechanism response signal, generating a comparison signal A through comparison operation and transmitting the comparison signal A to the OR gate module A204; the comparison module B203 is used for receiving a displacement sensor return signal and the actuating mechanism return signal, generating a comparison signal B through comparison operation and transmitting the comparison signal B to the OR gate module A204; the OR gate module A204 is used for receiving the comparison signal A and the comparison signal B, generating a remote-to-local switching instruction through OR operation, and outputting the remote-to-local switching instruction to the execution mechanism 3 through the safety instrument system 2; the execution mechanism 3 can realize the switching between the remote control mode and the local control mode after receiving a remote-to-local switching instruction transmitted by the safety instrument system 2.
The DCS system 1 is the DeltaV system of Emerson.
The actuating mechanism 3 is a REXA electro-hydraulic actuating mechanism.
The executing mechanism 3 further comprises a relay 301, a remote control switch 302, a local control switch 303, a confirmation switch 304, a remote control module 306 and a local control module 307, when the executing mechanism 3 receives a remote-to-local switching instruction, the relay 301 is powered on, the remote control switch 302 and the remote control module 306 are disconnected, the local control switch 303, the confirmation switch 304 and the local control module 306 are connected, and switching between the remote control mode and the local control mode is achieved.
The relay 301 is a 24V DC driven omron relay, and the remote control module 306 and the local control module 307 are both REXA TDB04011.01 control modules.
The safety instrument system 2 is a TS3000 system of the company TRICONEX.
A stator blade display system and an alarm system are arranged in the safety instrument system 2, the stator blade display system comprises a stator blade display A205 and a stator blade display B206, wherein the stator blade display A205 is used for receiving a return signal of the displacement sensor and generating a stator blade display image A; the stator blade display B206 is used for receiving the actuating mechanism response signal and generating a stator blade display image B; the alarm system comprises an actuator alarm 208, an actuator power-off alarm 209, an actuator operating state display 210, an OR door module B207 and a lamp screen 4, wherein: when the executing mechanism 3 is in an abnormal operation state, the executing mechanism 3 sends out an alarm signal, and the executing mechanism alarm 208 receives the alarm signal and displays an alarm; when the actuating mechanism 3 is in a power-off state, the actuating mechanism 3 sends out an actuating mechanism power-off alarm signal, and the actuating mechanism power-off alarm display 209 receives the actuating mechanism power-off alarm signal and displays an alarm; when the actuator 3 sends out an actuator status signal, the actuator operating status display 210 receives the actuator status signal and displays the current operating status of the actuator; the OR gate module B207 is used for receiving the alarm signal and the actuating mechanism power-off alarm signal, generating an actuating mechanism integrity alarm signal through OR operation and outputting the actuating mechanism integrity alarm signal to the lamp screen 4.
The comparison module A203, the comparison module B204, the OR gate module A205 and the OR gate module B206 are all programmable logic modules built in a TS3000 system, and the model of the lamp screen 4 is AD17-16/DC 24V.
The displacement sensor on-site display device further comprises a static blade on-site display 6, wherein the static blade on-site display 6 is used for receiving the displacement sensor response signal and generating a static blade on-site display image, and the model of the static blade on-site display 6 is DY22GB 02D.
The displacement sensor 5 is KYDM-LG1A4210-GB0600M2J115-W O, and the stator blade position sensor 305 is 50L 05C 502W 06962A 5K omega.
As shown in fig. 4, the method for controlling the fan vane by using the fan vane control system includes the following steps:
(1) the fan operates, the actuating mechanism 3 is in a remote control mode, and the safety instrument system 2 receives a stationary blade position signal, a displacement sensor return signal and an actuating mechanism return signal;
(2) judging whether the deviation between the return signal of the actuating mechanism and the return signal of the displacement sensor is greater than a given value by 3% and continuously exceeds a set time by 10s, if so, jumping to the step (4), otherwise, jumping to the step (3);
(3) judging whether the deviation between the return signal of the actuating mechanism and the position signal of the stationary blade is greater than a given value by 3% and continuously exceeds a set time by 10s, if so, jumping to the step (4), otherwise, jumping to the step (8);
(4) judging whether the fan is in an abnormal state, if so, skipping to the step (5), otherwise, skipping to the step (6);
(5) the fan executes a safe operation or emergency stop program;
(6) when a fault is judged, the relay 301 in the executing mechanism 3 is electrified, the remote control switch 302 is switched off, the local control switch 303 and the confirmation switch 304 are switched on, and the remote control mode is switched to the local control mode;
(7) after the fault is eliminated, the remote control switch 302 is switched on, and the local control mode is switched to the remote control mode;
(8) and (4) judging whether the operation of the device is finished or not, if not, jumping back to the step (1), and if so, finishing the control of the fan stationary blade.
The deviation value and the set time in the step (2) and the step (3) can be set according to the running and actual production conditions of the device, so that the control accuracy and stability of the control system are ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A fan stationary blade control system comprises a DCS (distributed control system), a safety instrument system and an executing mechanism, wherein a signal converter is arranged in the safety instrument system and used for receiving a stationary blade control signal transmitted into the safety instrument system by the DCS and converting the stationary blade control signal into a stationary blade position signal to be transmitted out of the safety instrument system, and the executing mechanism is used for receiving a stationary blade position signal and controlling a fan stationary blade according to the stationary blade position signal; a stator blade position sensor is arranged in the actuating mechanism, and can monitor the position of the stator blade of the fan in real time, generate an actuating mechanism response signal and transmit the actuating mechanism response signal back to the safety instrument system; the safety instrument system further comprises a comparison module A, a comparison module B and/or a door module A, wherein: the comparison module A is used for receiving the static blade position signal and the actuating mechanism response signal, generating a comparison signal A through comparison operation and transmitting the comparison signal A to the OR gate module A; the comparison module B is used for receiving a displacement sensor return signal and the actuating mechanism return signal, generating a comparison signal B through comparison operation and transmitting the comparison signal B to the OR gate module A; the OR gate module A is used for receiving the comparison signal A and the comparison signal B, generating a remote-to-local switching instruction through OR operation, and outputting the remote-to-local switching instruction to the execution mechanism through the safety instrument system; the execution mechanism can realize the switching between the remote control mode and the local control mode after receiving a remote-to-local switching instruction transmitted by the safety instrument system.
2. The fan vane control system of claim 1 wherein the DCS system is the DeltaV system of emerson.
3. The fan vane control system of claim 1 wherein the actuator is a REXA electro-hydraulic actuator.
4. The fan vane control system of claim 3 further comprising a relay, a remote control switch, a local control switch, a confirmation switch, a remote control module, and a local control module, wherein when the actuator receives a remote-to-local switching command, the relay is energized, the remote control switch and the remote control module are turned off, and the local control switch, the confirmation switch, and the local control module are turned on, thereby enabling switching between the remote control mode and the local control mode.
5. The fan vane control system of claim 4, wherein the relay is a 24VDC driven omron relay, and the remote control module and the local control module are each REXATDB04011.01 control modules.
6. The fan vane control system of claim 1 wherein the safety instrumented system is a TS3000 system from the company TRICONEX.
7. The fan vane control system as claimed in claim 6, wherein a vane display system and an alarm system are provided in the safety instrumentation system, the vane display system includes a vane display a and a vane display B, wherein the vane display a is configured to receive the return signal of the displacement sensor and generate a vane display image a; the stator blade display B is used for receiving the actuating mechanism response signal and generating a stator blade display image B; the alarm system comprises an execution mechanism alarm, an execution mechanism power-off alarm, an execution mechanism operation state display, an OR door module B and a lamp screen.
8. The fan vane control system of claim 7 wherein the comparison module a, the comparison module B, the gate module a and/or the gate module B are programmable logic modules built in the TS3000 system, and the lamp panel is model number AD17-16/DC 24V.
9. The fan vane control system of claim 1, further comprising a vane site display, wherein the vane site display is configured to receive the displacement sensor response signal and generate a vane site display image, and the vane site display is of type DY22GB 02D.
10. The fan vane control system of claim 1, wherein the displacement sensor is of the model KYDM-LG1a4210-GB0600M2J115-WO, and the vane position sensor is of the model 50L 05C 502W06962 A5K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020144177.XU CN211852214U (en) | 2020-01-22 | 2020-01-22 | Fan stationary blade control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020144177.XU CN211852214U (en) | 2020-01-22 | 2020-01-22 | Fan stationary blade control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211852214U true CN211852214U (en) | 2020-11-03 |
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ID=73233402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020144177.XU Expired - Fee Related CN211852214U (en) | 2020-01-22 | 2020-01-22 | Fan stationary blade control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211852214U (en) |
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2020
- 2020-01-22 CN CN202020144177.XU patent/CN211852214U/en not_active Expired - Fee Related
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Granted publication date: 20201103 Termination date: 20220122 |